小程序升级后出现如下错误，请问是什么情况

var pubs = {

//删除空格

trim:function (s)

{

return s.trim();

}

}

module.exports = {

trim:pubs.trim

}

<wxs src="…/…/utils/public.wxs" module=“pubs”></wxs>

wx:if="{{pubs.trim(item.F_DOuser)==DOuser}}"

提示错误

VM9557:5 TypeError: Cannot read property ‘trim’ of undefined

    at trim

    at ./pages/BX/BX.wxml:43:112